> ## Documentation Index
> Fetch the complete documentation index at: https://ghostbar.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> Welcome to the GhostBar documentation

## What is GhostBar?

GhostBar is a Chrome extension that lets you activate AI chat directly from any webpage using just your keyboard. With GhostBar, you can select any content—text, images, whatever you see—and instantly chat with AI about it, right in the context of your browsing.

<CardGroup cols={2}>
  <Card title="Set up your API Key" icon="pen-to-square" iconType="duotone" href="https://mintlify.com/docs/quickstart">
    Create an OpenAI API key to get started
  </Card>

  <Card title="Usage" icon="lightbulb" href="https://mintlify.com/docs/quickstart">
    Learn how to use GhostBar
  </Card>
</CardGroup>

## How much does GhostBar cost?

The GhostBar extension is completely free. The only expense is your usage of the OpenAI API which depends on how much you use the AI.